I noticed that commercial production of mushrooms such as oyster and shiitake involves the use of a lot of plastic. I am wondering about a more less wasteful operation. I understand you need the plastic first to sterilize the growth medium and then to open it to induce the growth of the fruiting body. Still, there may be a more "green" way of growing these mushrooms.
Straw mushrooms grow without plastic bags. As for oyster and siitake, you may use very thin bags from HDPE. They are strong enough and can withstand soft sterilization. The plastic can be recycled or converted to a liquid fuel.
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